<div class="col-sm-3">
  <ul class="nav nav-pills nav-stacked" style="margin-top:20px;">
    <li><a [routerLink]="['./flight-search']">Flug auswählen</a></li>
    <li><a [routerLink]="['./passenger-search']">Passagier auswählen</a></li>
  </ul>
</div>

<div class="col-md-9">
  <router-outlet></router-outlet>
</div>
